If you’ve noticed strange pop-ups or activation errors on your Windows 10 Pro, you’re not alone. Recently, thousands of users across the U.S., Japan, and South Korea reported an issue with Windows 10 Pro deactivating unexpectedly, even when using a legitimate license.
What Happened?
Starting November 8, frustrated users took to tech forums after booting their PCs and receiving unexpected error messages, including:
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0xC004C003 -
0xC004C004
These codes incorrectly suggested users were running unauthorized versions of Windows 10 Pro. Microsoft’s system then prompted them to either switch to Windows 10 Home or buy a new Pro license from the Microsoft Store.
Even though devices remained usable, users were left with annoying watermarks on their screens and warnings that their operating system was no longer activated.
Microsoft’s Response
Microsoft acknowledged the issue within hours. In a statement, they said their engineers were investigating a problem with the Windows Authentication servers. The root cause, at the time, remained unclear.
By November 9, Microsoft released an update:
“A limited number of customers experienced an activation issue that our engineers have now addressed. Affected customers will see the resolution over the next 24 hours as the solution is applied automatically. In the meantime, they can continue to use Windows 10 Pro as usual.”
Even after this update, some users reported ongoing issues through Saturday.
Will You Be Affected?
The bug affecting Windows 10 Pro deactivating seems limited in scope. Most impacted licenses came from digital upgrades, particularly those updated from earlier versions of Windows.
If you haven’t seen a deactivation message, your system is likely unaffected. However, if you have received one, don’t worry—it’s likely a temporary issue.
What You Can Do
If you’re dealing with this deactivation bug, here are your options:
1. Wait for the Fix
Microsoft has confirmed the issue is being resolved automatically. If your license is legitimate, you don’t need to buy anything. Just be patient.
2. Use the Troubleshooter
If you want to take action sooner, try using Windows’ built-in Troubleshooter:
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Go to Settings
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Click Update & Security
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Select Activation
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Click Troubleshoot
This tool can often revalidate your license immediately and remove the error.
Final Thoughts
Glitches like Windows 10 Pro deactivating can be alarming, but they’re often short-lived. If you’re using a valid license, there’s no need to panic or spend more money.
Stay calm, follow the steps above, and know that Microsoft is working behind the scenes to correct the issue.
Need Help?
If you’re still experiencing activation issues or need help navigating Windows problems, Vision Computer Solutions is here to assist. Call us at (248) 349-6115 for expert support.
